block/raw_bsd.c

   1 /* BlockDriver implementation for "raw"
   2  *
   3  * Copyright (C) 2010, 2013, Red Hat, Inc.
   4  * Copyright (C) 2010, Blue Swirl <blauwirbel@gmail.com>
   5  *
   6  * Author:
   7  *   Laszlo Ersek <lersek@redhat.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to
  11  * deal in the Software without restriction, including without limitation the
  12  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  13  * sell copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  25  * IN THE SOFTWARE.
  26  */
  27
  28 #include "block/block_int.h"
  29 #include "qemu/option.h"
  30
  31 static const QEMUOptionParameter raw_create_options[] = {
  32     {
  33         .name = BLOCK_OPT_SIZE,
  34         .type = OPT_SIZE,
  35         .help = "Virtual disk size"
  36     },
  37     { 0 }
  38 };
  39
  40 static TYPE raw_reopen_prepare(BlockDriverState *bs)
  41 {
  42     return bdrv_reopen_prepare(bs->file);
  43 }
  44
  45 static TYPE raw_co_readv(BlockDriverState *bs)
  46 {
  47     BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
  48     return bdrv_co_readv(bs->file);
  49 }
  50
  51 static TYPE raw_co_writev(BlockDriverState *bs)
  52 {
  53     BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
  54     return bdrv_co_writev(bs->file);
  55 }
  56
  57 static TYPE raw_co_is_allocated(BlockDriverState *bs)
  58 {
  59     return bdrv_co_is_allocated(bs->file);
  60 }
  61
  62 static TYPE raw_co_write_zeroes(BlockDriverState *bs)
  63 {
  64     return bdrv_co_write_zeroes(bs->file);
  65 }
  66
  67 static TYPE raw_co_discard(BlockDriverState *bs)
  68 {
  69     return bdrv_co_discard(bs->file);
  70 }
  71
  72 static TYPE raw_getlength(BlockDriverState *bs)
  73 {
  74     return bdrv_getlength(bs->file);
  75 }
  76
  77 static TYPE raw_get_info(BlockDriverState *bs)
  78 {
  79     return bdrv_get_info(bs->file);
  80 }
  81
  82 static TYPE raw_truncate(BlockDriverState *bs)
  83 {
  84     return bdrv_truncate(bs->file);
  85 }
  86
  87 static TYPE raw_is_inserted(BlockDriverState *bs)
  88 {
  89     return bdrv_is_inserted(bs->file);
  90 }
  91
  92 static TYPE raw_media_changed(BlockDriverState *bs)
  93 {
  94     return bdrv_media_changed(bs->file);
  95 }
  96
  97 static TYPE raw_eject(BlockDriverState *bs)
  98 {
  99     return bdrv_eject(bs->file);
 100 }
 101
 102 static TYPE raw_lock_medium(BlockDriverState *bs)
 103 {
 104     return bdrv_lock_medium(bs->file);
 105 }
 106
 107 static TYPE raw_ioctl(BlockDriverState *bs)
 108 {
 109     return bdrv_ioctl(bs->file);
 110 }
 111
 112 static TYPE raw_aio_ioctl(BlockDriverState *bs)
 113 {
 114     return bdrv_aio_ioctl(bs->file);
 115 }
 116
 117 static TYPE raw_has_zero_init(BlockDriverState *bs)
 118 {
 119     return bdrv_has_zero_init(bs->file);
 120 }
 121
 122 static TYPE raw_create(void)
 123 {
 124     return bdrv_create_file();
 125 }
 126
 127 static const char *raw_format_name(void)
 128 {
 129     return "raw";
 130 }
 131
 132 static int raw_open(BlockDriverState *bs)
 133 {
 134     bs->sg = bs->file->sg;
 135     return 0;
 136 }
 137
 138 static void raw_close(void)
 139 {
 140 }
 141
 142 static int raw_probe(void)
 143 {
 144     /* smallest possible positive score so that raw is used if and only if no
 145      * other block driver works
 146      */
 147     return 1;
 148 }